Description Additional Information Filter Thread: M 55x0.75 Focal Length (mm): 12 F# Range: 2.0-22 Image Diagnonal (mm): 23 Image Size at MOD (HxV): 182x136 Min Operating Distance: 0.1 Mount: C Weight (g): 250 F# 2.0-22 Focal Length 12 mm Format 4/3"